maps/edits.json in the repo and commit it. The packed maps are not modified.A surf ramp is too steep to stand on, so you never land on one — you fall along it, and the game deletes only the part of your velocity going into the face. Gravity pulls you down the slope. Strafing pulls you back up it, and turns the fall into speed. Hold one key, turn the mouse the same way, and do not stop.
Hold A and swing the mouse left, or D and swing right — whichever one pushes you up the face you are on. Keep the turn going the whole way down the ramp. When the ramp leans the other way, swap keys.
Holding W. Holding a strafe key without turning. Turning without a strafe key. Jumping — you are not standing on anything, so there is nothing to jump off. Sliding off the low edge is a fall — what that costs you depends on the course.